摘要
目的探讨微型种植体支抗辅助矫治成人安氏Ⅱ类2分类错（牙合）的临床作用机制。方法选择12例安氏Ⅱ类2分类病例，男4例，女8例，年龄18～38岁，平均21．0岁。应用微型种植体支抗牵引上牙列整体向后移动，压低上前牙，分析治疗前后患者牙齿、颌骨及软组织变化。结果上颌中切牙矢状向牙冠基本保持不动，牙根平均远中移动3．63mm，平均倾斜比率为6050％，牙冠压低4．60mm。上颌第一前磨牙牙冠平均远中移动3．25mm，牙根远中移动3．65mm，平均倾斜比率为112．3％，牙冠压低2．90mm。上颌第一磨牙牙冠平均远中移动3．11mm，牙根远中移动3．21mm，平均倾斜比率为103．2％，牙冠压低1．17mm。上颌第二磨牙牙冠平均远中移动3．22mm，牙根平均远中移动3．15mm，平均斜比率为97．8％，压低0．69mm。结论运用微型种植体支抗可以有效地使上颌牙列整体后移、压低上前牙并改建上颌前牙区齿槽骨形态，是非拔牙矫正安氏Ⅱ类内倾型深覆殆患者的有效方法。
Objective To explore the clinical mechanism of application of mini-screw implant anchorage-assisted correction for adult Class I1 Division 2 malocclusion. Methods Twelve cases of Class II Division 2 malocclusion patients were selected,including 4 male patients and 8 female patients, aging from 18 to 38 years old,with an average age of 21.0 years old. Miniscrew implant anchorages were applied to help the whole upper dentition move backwards and control anterior teeth intrusion. The changes of patients teeth, hard and soft tissues before and after treatment were analyzed. Results The dental crown of maxillary central incisor in sagittal direction kept still basically,the tooth root moved 3.63 mm on average with tipping ratio of 6050% and anterior teeth intrusion of 4.60 mm. The crown of maxillary first premolar moved 3.25 mm,the tooth root 3.65 mm with the average tipping ratio of 112.3% and the crown of tooth was intruded for 2.90 mm. The crown of maxillary first molar was distalized for 3.11 mm,the tooth root was distalized for 3.21 mm,with average tipping ratio of 103.2% and the crown of tooth was intruded for 1.17 ram. The crown of maxillary second molar has moved 3.22 mm, and the tooth root Was distalized for 3.15 mm averagely,with average tipping ratio of 97.8% , being intruded for 0.69 mm. Conclusions The application of mini-screw implant anchorage is effective for group distal movement of maxillary dentition,anterior teeth in- trusion and the reconstruction of the maxillary anterior alveolar bone. It is an effective way of non-tooth extraction correction for Class II Division 2 malocclusion cases.
出处
《口腔医学》
CAS
2014年第2期95-101,共7页
Stomatology
基金
浙江省医药卫生科技计划项目(2012KYB103)
浦东新区科技发展基金创新资金(PKJ2011-Y14)
浦东新区卫生系统优秀青年医学人才培养(PWRq2010-12)
关键词
微型种植体支抗
安氏Ⅱ类2分类错(牙合)
非拔牙矫正
成人矫正
mini-screw implant anchorage
Class II Division 2 malocclusion
non-extraction correction
adult orthodontics
